sat-nms L-Band Distributor LRXD
The sat-nms LRXD L-Band Distributor has two functions in professional satellite ground stations, it provides the redundant supply voltage for the Low Noise Converters (LNC) and distributes the receive signal to multiple outputs at which the satellite receivers are connected.
The compact version sat-nms LRXD14 is designed for
satellite ground terminals where a 19 zoll rackmount unit is not possible due
to space limitations, for example in mobile satellite news gathering terminals.
The unit provides:
- An active 0dB L-Band distributor with 4 L-band output ports, which mixed 50 Ohm SMA and 75 Ohm F connectors
- 14/18V and 22kHz tone switching initiated by contact closure interface, LNB’s Polarisation and Frequency range
- An external supplied 10MHz reference is mulitplexed on the L-Band interface to the LNC if aplied to 10MHz input
- The unit is powered by external 24V DC which are available in all satellite ground terminals
Internal amplifiers compensate the loss of the distribution circuit. The signal distribution is realized with cascaded Wilkinson dividers which guarantee good frequency response and isolation between the different output ports.
The models LRXD18, LRXD-28 und LRXD116 (1HU) includes two power supplies with two independent mains voltage input connectors. Internal redundancy switchover between the two power supplies improves the availabilty of the unit.
Model variants
The following versions of the sat-nms LRXD are available. All are delivered in a one HU rack drawer:
- LRXD18-50 : is connected to one LNC and provides 8 outputs with 50 Ohm SMA output
- LRXD28-50 : allows the connection of two LNC and provides per LNC 8 outputs with 50 Ohm SMA output
- LRXD116-50 : is connected to one LNC and provides 8 outputs with 50 Ohm SMA output
- LRXD18-75 : is connected to one LNC and provides 8 outputs with 75 Ohm F output
- LRXD28-75 : allows the connection of two LNC and provides per LNC 8 outputs with 750 Ohm F output
- LRXD116-75 : is connected to one LNC and provides 8 outputs with 75 Ohm F output
- LRXD14 : is connected to one LNC and provides 4 outputs with mixed 50/75 Ohm and SMA/F outputs
The versions LRXD18, LRXD-28 und LRXD116 are equipped with two redundant power supplies are in an 1 HU rackmount chassis.
Key features LRXD18/28/116
- 19” 1 height unit compact design
- One or two distributors in one unit
- Redundant power supplies
- DC free/protected outputs (no damage by IRD LNC supply voltage)
- Electronic over current protection
- High and low current alarms
- Adjustable alarm threshold
- Relay contact outputs for all alarms
- Alarms can be used for redundancy switching
- Monitoring Output @ 0dB at the front panel
- LNC current monitoring
Applications LRXD18/28/116
- In any type of satellite ground stations
- Cable Head Ends Stations
- LRXD28 as compact design for satellite news gathering transportable stations
- Connection of two LNC’s e.g. for both polarizations, to 1 HU unit
